Electric locomotive.



M. R. HANNA.

I ELECTRIC LOGOMOTIVE. APPLICATION rILnn 81:31. 11, 1900.

929,587. Patented Jul 27; 1909.

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WITNESSES |NVENTUR F'lAx R. HANNA M. R. HANNA. ELECTRIC LOGOMOTIVE.

APPLICATION FILED SEPT. 11, 1906.

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INVENTEIR MAX R. HAN-NA- I UNITED STATES PATENT OFFICE.

MAX R. HANNA, OF SGHE NEGTADY, YORK, ASSIGNOR TO GENERAL ELECTRICCOMPANY,

A CORPORATION OF NEW YORK.

ELECTRIC LOGOMO'IIVE.

' Specification of Letters Patent.

Patented July 27, 1909.

T 0 all whom it may concern:

Be it known that I, MAX R. HANNA, a citizen of the United States,residing 'at Schenectady,,county of Schenectady, State of New York, haveinvented certain new and useful Im rovements in Electric Locomotives, ofwhich the following is a specification.

In self-propelled electric vehicles, particularly cars and. locomotives,the space which may be allotted to the propelling motors, where themotors are arranged within the trucks beneath the main vehicle body isso restricted that, in order to secure great power for high speed orheavy traction work, they must be designed to operate much more nearlyat their ultimate capacity than is ordinarily the case in othersituations. One of the results of those. conditions is that the motorsare apt to become hot, lowering their efiiciency and also endangeringthe insulation. If means for dissipating the heat generated by suchmotors so as to maintain them relatively cool'can be provided, muchbetter results, both as to efiiciency of operation and maintenance maybe secured.

The present invention has for its object to provide means foreffectively cooling such motors without introducing complications whichare in themselves objectionable.

To the above end my invention comprises a novel construction and.arrangement of parts to be hereinafter particularly pointed out in theclaims.

For a better understanding of my invention and of its objects andadvantages reference may be had to the following detailed descriptiontaken in connection with the accompanying drawings which illustrate apreferred embodiment of my invention.

In said drawings, Fi ure 1 shows in side' elevation a two-truck electric car or locomotive provided with blowers for forcing currents ofcooling air past the motors, portions of the cab being broken away so asto more clearly show theblowers and the conduits leading therefrom tothe trucks on which the motors are mounted Fig. 2 is a view of one ofthe trucks shownin Fig. 1; and Fig. 3 is a a section taken on line 3-=-3of Fig.

The car on locomotive illustrated has one or more swiveled trucks and itis to this ty )0 of vehicle that my invention is particular yapplicable, although certain features of the invention may be used toadvantage in other situat ons.

[any iisual or preferred pair of conduits 12 and 13' In the drawings, Aindicates thecar or locomotive body or cab, and B and C indicate trucks,either or both of which may be swiveled.

Referring to truck B, which may be similar to the other truck or not, asit may be desired, 1, 2 and 3 indicate sets of wheels, two of which, 1and 3, are drivers. The motors are illustrated as being of the bi-polargearless type, wherein the field magnets 4 and 5 are built into thetruck framesv and the armatures 6 and 7 are mounted directly upon thedriving axles. The truck is provided-with form of center bearing 8 uponwhich one end adapted to rest so as to permit the truck to oscillateabout the center of the bearing and at the same time be held againstbodily movement laterally or longitudinally. This bearing is providedwith an opening 8', preferably circular in cross-section, and havlng itscenter at the axis about which the truhk is free to swing. A tube 9extends from'the vehicle body down into this opening. The tube may befixed'to the car body and j ourof the vehicle body is naled within the oening 8 so that as the" This tube forms the discharge conduit from ablower 10 which may conveniently be placed in the top of the cab anddriven by a small motor 1 1 or inany other desiredmanner. 11 extend"from a point adjacent the lower end of the tube 9 to points adjacentthe armatures 6 and 7, respectively. These conduits, it will be seen,form part of the truck structure, as it were, and follow the movementsof the truck. Thus, there is provided a connection between the blowerand each motor which consists of a conduit fixed toand movable with thevehicle body and a second conduit fixed to and movable with the truck;all flexible connec tions being avoided. The conduits 12 and 13 areshown as being square 1n cross-sectlon at thcpoints where they leave thecenterv bearing and pass through the yokesof the hold magnets and ashaving their outer ends expanded at 14 and 15, respectively, in order todistribute the air across the entire upper It-will be seen field magnetframes, they are situated so as I conduit and to discharge the coolingair in the most advantageous manner, and at the same time areeifectively housed and protected without taking up space which wouldotherwise be available for other purposes.

If the truck C is also a motortruek, a second blower 16 may convenientlybe placed at the end of the cab adjacent that truck to supply a coolingmedium to the motors at that end of the vehicle through a conduit 17corresponding to the tube 9. It is, however, not essential that se arateblowers be used as this is a matter w ich depends upon the particularconditions in any given case.

It will be obvious that my invention is susceptible of modification inmany ways, since in itsbroader aspects it contemplates the use of anyconduit for carrying a cooling .medium, the conduit extending from thevehicle body to the motor -or motors on the truck and including aportion passing through they pivot of the truck. The particulararrangement illustrated is, however, simple and compact and one whichmay be used ad-vantageously with the-truck shown.

at I claim as new, and desire to.secure by Letters Patent of the UnitedStates, is, 1. In an electric vehicle, a motor-truck having a bearing, avehicle body carried upon said bearing, a conduit extending from,

the truck motor through said bearing, and means carried bythe vehiclebody for causing a circulation of cooling fluid through said conduit.

' pivot of the truck, and means for creating a circulation of coolingfluid through said con- (luit.

3. In an electric vehicle, a motor-truck swiveled beneath the vehiclebody, a conduit extending from-the truck-motor through the pivot of thetruck and to the vehicle body, and means carried upon the vehicle forcreating a circulation of cooling fluid through said ast the truckmotor.

4. In an e ectric vehicle, a truck having a propelling motor a bearingon said truck, a cab seated on said bearing, a source of air underpressure in said cab, and a conduit for conveying air from said sourceto the said motor, said conduit passing through the bearing between thetruck and the cab.

5. In an electric vehicle, atruck having a propelling motor, a bearingon said truck, a cab supported'upon said bearing, a blower mounted insaid cab, and a conduit for conveying air from said blower to a pointadjacent the said propelling motor to cool the same, said conduitpassing through thesaid bearing between the truck and the cab.

6. In anelectric vehicle, a truck swiveled beneath the vehicle body, amotor on said truck, a conduit passing from a point adjaswiveled beneaththe locomotive body; a

motor on said truck, a conduit leading from said motor and through thepivot of the truck to the locomotive body, and means carried by thelocomotive for causing air to flow through said conduit to the motor forcooling the same. i

' 8. In an electric locomotive, a truck swiv'eled beneath the locomotivebody, a motor on said truck, a blower carried by the locomotive body,and a conduit extending from said blower through the pivot of the truckto a point adjacent said motor for conveying a stream of cooling airfrom the blower to the motor. v

9. In an electric locomotive, a truck swiveled beneath the locomotivecab, a propelling motor on said truck, a blower mounting from saidhollow center bearing to the motor, a blower carried by the locomotivebody, and a conduit connecting the discharge end of the blower to saidhollow center bear 11. In an electric vehicle, a truck, a motor havingan armature mounted upon one of the truck axles, a hollow center bearingon said truck, a tube leading from said lcenter hearing to a pointadjacent the said armature,

and a blower carried by the vehicle and con- 4 nected to. said hollowcenter bearing for forcing a stream of cooling air across said armature.

12. In an electric vehicle, a truck, a hollow center bearing on saidtruck, propelling motors on o posite sides of said center bearing,conduits eadirig from said center bearing to each of said motors, andmeans carried by the vehicle and'connected to the said center bearingfor creating a circulation of cooling fluid through the center bearingand con- .duits past the said. motors. i

13. In an electric locomotive, a truck, a

hollow center bearing on said truck, a pair of propelling motors onsaid. truck on opposite sides of said bearing, conduits leading fromtheinterior of said bearing to the motors, a blower carried by thelocomotive, and a pi e connecting the blower to the interior of t ecenter bearin 14. In an el ectric locomotive, a locomotive body, aplurality ofswiveled trucks under said body, pro elling motors oncertain of said trucks, :1 p urality of blowers, and a conthe motor ormotors of that truck.

through the same; means for delivering a from each of said blowers duitpassin %$ivot of one of said trucks and to through the 15. In a systemof Ventilation for electric railway-motors, the combination of a truckprovided with one or more motors and havmg swivel connection with thecar, said swivel connection having an air-passage current of air intothe upper end of said airpassage; and means for conducting the currentof air from the lower end of the air-passage to the motor or motors.

16. In a system of ventilation for electric railway-motors, thecombination of a truck having one or more motors and having a swivelconnection with the car, said swivel connection having an air-passagethrough the same; .a blower; an air-conduit conducting air from theblower to the upper end of the said airassage, and one or more pipesconnecting t 1e low r end of said air-passage with the motor'or motors.I

In witness whereof, I have hereunto set my hand this 10thday ofSeptember, 1906.

MAX R. HANNA.

( Witnesses:

BENJAMIN B. HULL, HELEN ORFORD.

